Guan Yu crossed the Yellow River with tens of thousands of troops and marched towards Beihai.

Before sending troops, when Guan Yu passed by Pingyuan County, he also stayed in Pingyuan County for a while.

Pingyuan County has too many memories of Guan Yu, he and Liu Bei Zhang Fei are officials here, and the people here know Guan Yu, and they are proud of their former parents and officials to become famous generals. It can be said that Pingyuan is Guan Yu's other home.

In Pingyuan County, Guan Yu looked at the various landscapes he was familiar with and was full of emotion.

There are so many memories here.

When the people of the plain saw Guan Yu, they also greeted him. Someone also asked about Liu Bei and Zhang Fei. This made Guan Yu not know how to answer, and in the end he could only prevaricate.

After staying in the place where his three brothers used to live for a few days, Guan Yu continued to set off.

The past is all in the past, and what should be let go is still to be put down.

Qingzhou had already prepared boats to cross the river, and Guan Yu's army stepped on the opposite bank very smoothly. There was no navy on Cao's side, so there was no way to stop Guan Yu's landing.

Guan Yu's advance was soon met with stubborn resistance from the Cao army led by the Beihai defender Cao Hong.

Cao Cao was well aware of the importance of Beihai and arranged Cao Hong to arrange defense in Beihai.

Cao Hong also lived up to Cao Cao's expectations and arranged a lot of defensive measures in Beihai. It can't be said to be impregnable, but whoever wants to break through the North Sea will not be able to pay a heavy price.

If you defend against other people's attacks, you may be successfully blocked by Cao Hong.

It's a pity that he met Guan Yu, a person who is familiar with the situation in Beihai. Guan Yu once broke hundreds of thousands of Qingzhou yellow turbans here, and he was very clear about the terrain of Beihai.

Liu Yu used Guan Yu as the main general, which is simply good steel used on the blade.

Guan Yu advanced all the way, and in the face of the defense arranged by Cao Hong, he could always use the terrain to break the defense one by one. Cao Hong deployed so many troops, but he couldn't get much effect, and wasted too many troops in vain.

Of course, Cao Hong would not let Guan Yu be arrogant, and personally led his troops to raid Guan Yu. But Guan Yu was not something Cao Hong could fight against, and he was defeated in a few rounds. If it weren't for Cao Hong's personal soldiers who resisted, Cao Hong might have died at the hands of Guan Yu. Guan Yu fought hard to catch up and killed countless people.

In the field battle, Cao Hong was defeated and returned, and fled back to Beihai City.

With this momentum, Guan Yu's troops continued to rush and kill.

In the face of Guan Yu's ferocious offensive, Cao Hong was a little helpless, his troops were a little insufficient, and he was no longer able to send troops to make trouble for Guan Yu.

Cao Hong is a rare general, resourceful and forceful. But his greatest talent was not in marching and fighting, but in business.

To say that the entire family surnamed Cao is the most good at doing business, Cao Hong. Cao Hong is a member of the Cao family, but his family environment is very poor, not as good as a rich man like Cao Cao, and his life is tight, so he attaches more importance to money. However, it does not mean that Cao Hong is a greedy person, he will never do anything to be corrupt and take bribes, but Cao Hong has opened a lot of industries and made a lot of money. Even in Beihai, Cao Hong has run several industries, taking into account both public and private interests.

Guan Yu had already killed Beihai City, and Cao Hong was shocked by the black oppressive army.

Cao Hong didn't expect that it would be useless to do so many defensive measures by himself, and he didn't block Guan Yu.

The adjutant general came over and reported to Cao Hong: "General Hui, the last general has blocked the three city gates, leaving one city gate for transfer, and the fire oil and wood gold juice are ready. At the end, we will arrange for people to organize strong men to come up and defend the city! ”

"Okay, good work." Cao Hong treats his subordinates well.

The adjutant general looked at the enemy troops under the city and asked, "General, is there any way to retreat from the enemy?" ”

Cao Hong smiled: "Don't worry, the lord has already arranged for Xuzhou Assassin Shi to send reinforcements over." It is estimated that it will not take long to come, as long as it lasts for a few days, Guan Yu will naturally retreat. ”

The adjutant nodded, he was also confident that reinforcements would arrive soon.

And Guan Yu, Guo Tu, and Hou Cheng under Beihai City were discussing the attack.

"General Guan, will our army attack!" Hou Cheng came to ask.

Guan Yu stared at Beihai City and said lightly: "Don't worry. Do you know who defended the North Sea? What about the troops? ”

Guo Tu looked at the banner and said, "Looking at the official position on the banner, it is estimated that it is Cao Cao's brother Cao Hong." After the previous battles, there were not many troops left in Beihai City. ”

"Cao Hong? What is its capacity? "Guan Yu really hasn't heard of it.

Guo Tu took out the information of Cao Jun's generals given by the "Dark Department" and read it, and said: "Cao Hong is both civil and military, but his strength is not marching and fighting. Intelligence says that he is very good at doing business. ”

"General, look at Beihai's posture is ready to defend to the death, it is estimated that it is not so easy to fight." Hou Cheng found a problem.

"Dirt Chicken Tile Dog! The whole army is ready to storm the city! Guan Yu snorted coldly, and then began to arrange the siege battle.

"Yes!" Hou Cheng took the order and left.

The troops under the city slowly spread out their attack formation.

"All on alert! The enemy is attacking! Cao Hong said hurriedly.

The defenders of the North Sea immediately mobilized and took up all kinds of weapons to prepare for battle.

Guan Yu's troops rushed up with ladders and bumping wood.

Cao Hong watched the enemy army continue to approach, slowly raised his right hand, and as soon as the opponent was close to the firing range, he began to order the bow and arrow to be fired, and the archers were all ready to attack at any time.

But before Cao Hong's bow and arrow were fired, Guan Yu's bow and arrow shot over. The defenders of the North Sea were stunned by the sudden attack, and many soldiers fell to the ground with arrows.

Cao Hong was also almost shot, and scolded: "Damn, how did this enemy's bow and arrow shoot so far?" ”

The others didn't know, and they couldn't understand why the enemy archers were able to shoot so far.

In fact, Liu Yu's army has all been replaced with brand-new crossbows, and the range is fifty paces farther than the crossbows currently used by the princes.

These fifty steps are a huge advantage that can overwhelm the enemy. As early as the beginning of the establishment of the Ordnance Department, Liu Yu ordered the person in charge of the Ordnance Department to start researching happily, and it took a lot of manpower, material resources and time to study it. Liu Yu ordered the Ordnance Division to go all out to build it, and finally equip the whole army before the expedition.

This is Liu Yu's secret weapon.

Cao Hong in Beihai suffered a big loss, and if he continued to fight like this, there was no way to fight back.

With such a long-range attack advantage, the siege infantry quickly set up a ladder on the wall.

Guan Yu's soldiers quickly climbed the city wall along the ladder, and some soldiers carried the bumper wood and kept ramming the city gate.

"Hurry up and fight back! Can't let them climb the walls! Cao Hong roared angrily.